C# WinForm中的快捷键实现方法

 1. 声明系统API：

   [DllImport("user32.dll", EntryPoint = "RegisterHotKey", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vlc);

        [DllImport("user32.dll", EntryPoint = "UnregisterHotKey", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

 

重载OnLoad，注册热键：

 

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            WinApi.RegisterHotKey(this.Handle, 225, 0, (int)Keys.F10);
            WinApi.RegisterHotKey(this.Handle, 226, 0, (int)Keys.F11);
        }

 

在FormClosing事件中注销热键：

        private void Form_Main_FormClosing(object sender, FormClosingEventArgs e)
        {
            WinApi.UnregisterHotKey(this.Handle, 225);
            WinApi.UnregisterHotKey(this.Handle, 226);
        }

 

 重载 WndProc函数 处理热键

        protected override void WndProc(ref Message m)
        {
             base.WndProc(ref m);

            switch (m.Msg)
            {

                case 0x0312:    //这个是window消息定义的注册的热键消息

                    if (m.WParam.ToString().Equals("225"))  //F11
                    {
                        this.buttonItem_ToolBar_电网监测_Click(null, null);
                    }

                    else if (m.WParam.ToString().Equals("226"))  //F12
                    {
                        this.panel1.Visible = !this.panel1.Visible;
                    }
                    break;
            }
        }